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    • 12. 发明申请
    • METHOD AND APPARATUS FOR IMPLEMENTING MULTI-CELL COOPERATION TECHNIQUES
    • 用于实施多小区合作技术的方法和设备
    • WO2010017101A2
    • 2010-02-11
    • PCT/US2009052372
    • 2009-07-31
    • INTERDIGITAL PATENT HOLDINGSBALA ERDEMSHIN SUNG-HYUKPIETRASKI PHILIP JPASAD KALPENDU R
    • BALA ERDEMSHIN SUNG-HYUKPIETRASKI PHILIP JPASAD KALPENDU R
    • H04B7/02H04B7/06
    • H04B7/024H04B7/06H04B7/0639H04B7/066
    • A method and apparatus are provided for multi-cell cooperation when multiple cells are cooperating to transmit data to a plurality of wireless transmit/receive units (WTRUs), and each cell is using a common precoding matrix. The level of information exchanged among the cells may depend on the particular cooperation architecture. The cells may share information such as channel state information (CSI), a channel quality indicator (CQI), or both. The cells may share rank indications reported by the WTRUs. The cells may also share the data that is being transmitted to the WTRUs. The method and apparatus may also determine precoding vectors for closed-loop precoding; a CQI, CSI and rank, and distributed space-time/frequency coding with multi-cell cooperation. The method and apparatus may also perform hybrid automatic repeat request (HARQ) with multi-cell cooperation, and downlink control signaling.
    • 当多个小区协作向多个无线发射/接收单元(WTRU)传输数据时,提供用于多小区协作的方法和设备,并且每个小区使用公共预编码矩阵。 小区之间交换的信息的级别可能取决于特定的协作架构。 小区可以共享诸如信道状态信息(CSI),信道质量指示符(CQI)或两者的信息。 小区可以共享WTRU报告的等级指示。 这些小区也可以共享正在发送给WTRU的数据。 该方法和装置还可以确定用于闭环预编码的预编码向量; CQI,CSI和秩以及具有多小区协作的分布式空时/频率编码。 该方法和装置还可以执行具有多小区协作的混合自动重传请求(HARQ)以及下行链路控制信令。
    • 15. 发明申请
    • AUGMENTED WIRELESS FEEDBACK
    • 增强的无线反馈
    • WO2011085082A3
    • 2011-10-06
    • PCT/US2011020346
    • 2011-01-06
    • INTERDIGITAL PATENT HOLDINGSPORAT RONPIETRASKI PHILIP JLI YINGXUE KSHENG HONGSAN
    • PORAT RONPIETRASKI PHILIP JLI YINGXUE KSHENG HONGSAN
    • H04B7/06
    • H04B7/063H04B7/0639H04B7/065
    • Methods and systems for transmitting feedback and precoding matrix indicators (PMI) include determining PMI and rank-1 or rank-2 feedback, determining a difference, referred to as a delta metric, between the PMI and its preferred feedback matrix, and transmitting the delta metric to a base station. The timing of delta metric transmissions can be based on detecting the exceeding of a threshold, intervals signaled by a base station, or other factors. Overhead may be reduced by manipulating a determined delta metric so that fewer complex values need to be transmitted and a base station can estimate values of the delta metric that are not transmitted. The delta metric may be mapped using phase and/or amplitude modulation methods. Delta metric transmissions may be repeated by alternately transmitting elements of the delta metric and complex conjugates of those elements.
    • 用于传送反馈和预编码矩阵指示符(PMI)的方法和系统包括确定PMI和秩-1或秩-2反馈,确定PMI与其优选反馈矩阵之间的被称为增量度量的差,并且传送增量 度量到基站。 德耳塔度量传输的定时可以基于检测到超过阈值,由基站用信号通知的间隔或其他因素。 可以通过操纵确定的增量度量来降低开销,从而需要传输更少的复值,并且基站可以估计未传输的增量度量的值。 增量度量可以使用相位和/或幅度调制方法来映射。 可以通过交替地传输增量度量的元素和那些元素的复共轭来重复Δ度量传输。